"I've just spent a rather frustrating morning attempting to debug major performance problems with my home wireless network; one of my machines couldn't associate with the AP at all anymore, and the laptop (which was upstairs in the home office, for a change) was getting horrific, sub-dialup speeds.
"I did lots of moving of Linksys APs and tweaking of 'txpower' settings, without much in the way of results. Cue tearing hair out etc..."